Efficient enhancement of bismuth near infrared luminescence by the co-doping of tantalum in GYAP crystal

Abstract

Bi/Ta double doped GdYAlO (Bi/Ta:GYAP) near-infrared (NIR) laser crystal was successfully grown. The codoping of Ta was demonstrated to effectively enhance the NIR fluorescence emission in Bi/Ta:GYAP crystal for the first time. The introduced Ta ion can induce the change of valence states from Bi to Bi based on the charge compensation mechanism, bringing about the enhanced NIR fluorescence emission. The three NIR fluorescence emission peaks centering at 1005, 1195, and 1280 nm were ascribed to three different Bi active centers in Bi/Ta:GYAP crystal. These results suggest that the Bi/Ta:GYAP crystal may have potential applications in NIR broadband lasers.

Recent Advances in Super Broad Infrared Luminescence Bismuth-Doped Crystals

“…In 2018, Zhang and co-workers synthesized Yb/Bi co-doped PbF 2 single crystal using Bridgman method ( Zhang et al., 2018a , 2018b ). Figure 3 shows the NIR emission spectra of prepared samples.…”

“…However, the authors found efficient NIR luminescence if co-doped with Yb 3+ ions, in which energy transfer from Yb to Bi should explain this phenomenon ( Xiong et al., 2012 ). Another way to enhance NIR emission has also been reported in Bi/Ta co-doped Gd 0.1 Y 0.9 AlO 3 single crystal, because the introduction of Ta 5+ can effectively lead to the change of valence states from Bi 3+ to Bi + based on the charge compensation mechanism ( Zhang et al., 2018a , 2018b ).…”

Study on optical properties and luminescence of Er3+/Yb3+ co-doped La2O3-Nb2O5-Ta2O5 glasses prepared by aerodynamic levitation

“…Efficient near-infrared photo-luminescence has attracted more and more attention for the promising applications in optical fiber communication [1], remote sensor [2], biological imaging [3], and laser guide stars [4] , etc. So these laser materials have become study focus [5][6][7].…”